Peter,
As a noise immunity freak I have had to be pulled kicking and screaming into the 21st century, the acceptance of 3.3V was not easy.

However, it came to the point where I needed the speed of the Cygnals and I had to take the plunge.
In the process of designing my first device with the Cygnals I discovered things like "HCT is 3.3V in and 5V out" Philips makes "a 74LVC4245 that makes 5V signals 3.3V" The LM2937 makes all the 3.3 you need with your 5V. All my products are 5V to the outside world, but now most run 3.3V internally.

I feel your pain, but, just like me, some day, you will be forced to take the plunge.

By the way, when you go 3.3 you will have your beloved CoolRunners again - oddly enough then you will not need them. Due to the quartersize geometry of the 3.3 silicon there are 3.3 devices available with so many features the 5V world can only imagine.

Do yourself a favor: you know the 2051/4051 have a look at the datasheet for the P89LPC935 which cost something similar. You WILL be amazed.

Erik